It follows reports that President Trump was outraged by comments made by Mulvaney during the Ukraine corruption saga.
The allegations of abuse of power over the Ukraine incident led to impeachment proceedings against President Trump.
Mulvaney's departure has been on the cards for the last few weeks.
Mr Mulvaney is to become US special envoy to Northern Ireland, while North Carolina lawmaker Mark Meadows has been appointed to take over his former position.
Israel reopens Gaza's Rafah border crossing to Egypt, with limits
Israel reopened the border between Gaza and Egypt on Monday for people on foot, a move that would allow Palestinians to leave the enclave and let back in those who want to return after fleeing Israel's war in the enclave.
US envoy Witkoff to visit Israel, meet Netanyahu, Israeli officials say
US President Donald Trump's senior envoy Steve Witkoff is expected to visit Israel for meetings with Prime Minister Benjamin Netanyahu and Israel's military chief, two senior Israeli officials said on Monday.
Russian drone strike kills 12 miners in Ukraine
At least 12 people were killed and seven wounded after a Russian drone struck a bus carrying miners in Ukraine's southeastern Dnipropetrovsk region, energy firm DTEK and government officials said on Sunday.
Singapore to launch space agency in response to global investment surge
Singapore will launch its own space agency on April 1 as it bids to "fully harness the value and opportunities of the growing global space economy", the country's trade ministry announced on Monday.
Five-year-old boy returns to Minnesota after ICE release
Five-year-old Liam Conejo Ramos and his father have returned to their home in a Minneapolis suburb after being detained by US immigration officers and held at a detention facility in Texas, a lawmaker said on Sunday.
Reopening of Gaza's Rafah crossing expected Monday
Gaza's main border crossing in Rafah will reopen for Palestinians on Monday, Israel said, with preparations underway at the war-ravaged enclave's main gateway that has been largely shut for almost two years.
Winter storm death toll in United States reaches 90
Nearly 90 people have died in bitter cold affecting areas of the United States from Texas to New Jersey, according to media reports citing local authorities.
Pakistan says 145 militants killed after attacks in Balochistan
Pakistan's security forces killed 145 militants over 40 hours after coordinated attacks across Balochistan, the chief minister of the southwestern province said on Sunday, as the authorities battle one of the deadliest flare-ups in years.
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Pinoy Expat Corner
Welcome to Pinoy Bulletin, your go-to source for staying informed about important announcements, exciting group activities, community events, and job opportunities!
Pinoy Expat Corner
Welcome to Pinoy Bulletin, your go-to source for staying informed about important announcements, exciting group activities, community events, and job opportunities!
